Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Em que semana houve menos de 30.348 pessoas presentes com um resultado de W 37-21?
 ###Tabelas: CREATE TABLE season_19:_2012 (season_19:_2012_id AUTO_INCREMENT PRIMARY KEY, Series Ep. VARCHAR, Episode INT, Segment A VARCHAR, Segment B VARCHAR, Segment C VARCHAR, Segment D VARCHAR) CREATE TABLE indian_standard_beams_ismb (indian_standard_beams_ismb_id AUTO_INCREMENT PRIMARY KEY, Type VARCHAR, Beam height (mm) INT, Flange width (mm) INT, Web thickness (mm) VARCHAR, Flange thickness (mm) VARCHAR, Weight (kg/m) VARCHAR, Cross-section area (cm 2 ) VARCHAR, Moment of inertia in torsion (J) (cm 4 ) VARCHAR) CREATE TABLE novelisations (novelisations_id AUTO_INCREMENT PRIMARY KEY, Story # INT, Target # VARCHAR, Title VARCHAR, Author VARCHAR, Reader VARCHAR, Format VARCHAR, Company VARCHAR, Release Date VARCHAR, Notes VARCHAR) CREATE TABLE schedule (schedule_id AUTO_INCREMENT PRIMARY KEY, Week INT, Date VARCHAR, Opponent VARCHAR, Result VARCHAR, Attendance INT) CREATE TABLE summary_of_general_election_performance (summary_of_general_election_performance_id AUTO_INCREMENT PRIMARY KEY, Year VARCHAR, Number of Candidates INT, Total votes INT, Average voters per candidate INT, Percentage of vote VARCHAR, Saved deposits INT, Change (percentage points) VARCHAR, Number of MPs INT)  
SELECT SUM Week FROM schedule WHERE Attendance < 30,348 AND Result = w 37-21